Recycling AZ91D magnesium alloy chips prepared by solid-state recycling3
A method for recycling AZ91D magnesium alloy chips prepared by solid-state recycling was studied.The experiments were carried out adopting the cold-press pressure of 300-310MPa,cold-pressed time of 3-5s,and hot extrusion at 300℃,350℃,400℃,450℃,respectively,with an extrusion ratio of 25∶1.The results indicate that recycled specimens of AZ91D magnesium alloy present better mechanical properties and consist of fine grains due to dynamic recrystallization.The mechanisms of dynamic recrystallization depend on plastic deformation process and change with the deformation temperature.At 300-350℃,the deformation mechanisms are associated with the operation of basal slip and twinning,and the necklace structures were formed.At 350-400℃,the cross slip results in the formation of new grains and grain refinement.At above 400℃,the dynamic recrystallization mechanisms are controlled by dislocation climb,and recrystallized grains are homogeneous.The tensile strength of recycled specimens increases with the strain rate increasing.When the strain rate is overhigh,the cracks and fractures in the surface appear and affect the tensile strength of recycled specimens.
AZ91D magnesium alloy chips solid-state recycling extruding temperature strain rate
Hu Maoliang Ji Zesheng Chen Xiaoyu Wang Qudong Ding Wenjiang
School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150 School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150 National Engineering Research Center for Light Alloy Net Forming, Shanghai Jiao Tong University, Sha
国际会议
上海
英文
29-29
2012-10-19（万方平台首次上网日期，不代表论文的发表时间）